From 273a6623e7b97bb133486707a656f00209820b43 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Sun, 29 Jul 2012 14:28:41 +0200
Subject: libvo: remove custom assembler memcpy implementations (aka
 fastmemcpy)

aclib[_template].c contained inline assembler versions of memcpy using
MMX/SSE/3dnow etc. instructions. It's possible that this gave quite a
speed a decade ago, but it's unlikely to have any use on modern
systems. Also, libc implementations already have their own
optimizations for the native memcpy function.

I did not verify my assumptions eith benchmarks, so I could be wrong.

Also note that some platforms have extremely crappy libc
implementations, and it's well possible that these might suffer from a
major performance loss (hello Windows). Unfortunately, I do not care.
---
 configure | 15 ---------------
 1 file changed, 15 deletions(-)

(limited to 'configure')

diff --git a/configure b/configure
index 5638d07f7c..dee290d63d 100755
--- a/configure
+++ b/configure
@@ -454,7 +454,6 @@ Advanced options:
   --enable-armvfp           enable ARM VFP (ARM) [autodetect]
   --enable-neon             enable NEON (ARM) [autodetect]
   --enable-iwmmxt           enable iWMMXt (ARM) [autodetect]
-  --disable-fastmemcpy      disable 3DNow!/SSE/MMX optimized memcpy [enable]
   --enable-big-endian       force byte order to big-endian [autodetect]
   --enable-debug[=1-3]      compile-in debugging information [disable]
   --enable-profile          compile-in profiling information [disable]
@@ -569,7 +568,6 @@ _xinerama=auto
 _vm=auto
 _xf86keysym=auto
 _alsa=auto
-_fastmemcpy=yes
 _unrar_exec=auto
 _win32dll=no
 _select=yes
@@ -885,8 +883,6 @@ for ac_option do
   --disable-radio-bsdbt848)     _radio_bsdbt848=no      ;;
   --enable-pvr)         _pvr=yes        ;;
   --disable-pvr)        _pvr=no         ;;
-  --enable-fastmemcpy)  _fastmemcpy=yes ;;
-  --disable-fastmemcpy) _fastmemcpy=no  ;;
   --enable-networking)     networking=yes    ;;
   --disable-networking)    networking=no     ;;
   --enable-winsock2_h)  _winsock2_h=yes ;;
@@ -2744,15 +2740,6 @@ fi
 echores "$_alloca"
 
 
-echocheck "fastmemcpy"
-if test "$_fastmemcpy" = yes ; then
-  def_fastmemcpy='#define CONFIG_FASTMEMCPY 1'
-else
-  def_fastmemcpy='#undef CONFIG_FASTMEMCPY'
-fi
-echores "$_fastmemcpy"
-
-
 echocheck "mman.h"
 _mman=no
 statement_check sys/mman.h 'mmap(0, 0, 0, 0, 0, 0)' && _mman=yes
@@ -5484,7 +5471,6 @@ DVDREAD = $_dvdread
 DVDREAD_INTERNAL = $_dvdread_internal
 DXR3 = $_dxr3
 FAAD = $_faad
-FASTMEMCPY = $_fastmemcpy
 FTP = $_ftp
 GIF = $_gif
 GL = $_gl
@@ -5704,7 +5690,6 @@ $def_unrar_exec
 $def_charset
 $def_crash_debug
 $def_debug
-$def_fastmemcpy
 $def_runtime_cpudetection
 $def_sighandler
 $def_sortsub
-- 
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